2013 was a success, but got a bit laborious on my end. Keeping it simple this year by making it self-managed with a Google account. Access to your own tab should make it easier to modify your own charts.
To gain access:
Here's the sheet
Create a Google account without GMail here (using an existing address if you wish)
E-mail me at firstname.lastname@example.org with the address you wish to use (strict privacy, used only to give you access to your sheet). I'll create your tab and grant access.
I will update the main page as often as I can to keep the graph tidy. This is not a competition, but a motivator to ride more.
Questions may be sent to email@example.com